And Francis I., who both bid for the friendship of the infamous Aretino, surnamed the divine, both likewise engaged astrologers to fight their battles.
Other Italian scholars, as Leonardo Aretino, benefited by his patronage.
Even the comedies of the best authors are too observant of Latin precedents, although some pieces of Machiavelli, Ariosto, Aretino, Cecchi and Gelli are admirable for vivid delineation of contemporary manners.
Francesco contains famous frescoes by Piero de' Franceschi, representing scenes from the legend of the Holy Cross, and others by Spinello Aretino, a pupil of Giotto.
Among the natives of Arezzo the most famous are the Benedictine monk Guido of Arezzo, the inventor of the modern system of musical notation (died c. 1050), the poet Petrarch, Pietro Aretino, the satirist (1492-1556), and Vasari, famous for his lives of Italian painters.